...It promptly froze open, and liquidair, the remnant of what in primordial days was an outer atmosphere,poured down the tunnels... 
Various 「Astounding Stories, August, 1931」
...Buck stood and looked on, the successful champion,the dominant primordial beast who had made his kill and found it good...
Jack London 「The Call of the Wild」
...Their primordial existence in the mind is to-day demonstrated; they need only to be systematized and catalogued...
P. J. Proudhon 「What is Property?」
...Müller has shown, this seems caused by an abnormal state of the primordial cartilage...
Charles Darwin 「The Variation of Animals and Plants Under Domestication, Vol. I.」
...Being less long than the other two pairs, they are brought into immediate contact with those primordial implements, the mandibles and the spinneret...
J. Henri Fabre Alexander Teixeira de Mattos 「The Life of the Fly」
...We have, up to the present, only considered that form of segmentation andgastrulation which, for many and weighty reasons, we may regard as theoriginal, primordial, or palingenetic form...
Ernst Haeckel 「The Evolution of Man」
...The first and oldest of the four or five chief divisions of the organic historyof the earth is called the primordial, archaic, or archeozoic period...
Ernst Haeckel 「The Evolution of Man」
...The primordial age is followed by a much shorter division, the paleozoicor Primary age...
Ernst Haeckel 「The Evolution of Man」
...But the higher stems also remained in the water during the primordial epoch...
Ernst Haeckel 「The Evolution of Man」
...In it we see what our own planet must have been in its primordial epoch,in the pristine times of terrestrial genesis...
Camille Flammarion Frances A. Welby 「Astronomy for Amateurs」
...What doesthis prove? The Earth was not inhabited during its primordial period:what did that prove to the inhabitants of Mars or of the Moon...
Camille Flammarion Frances A. Welby 「Astronomy for Amateurs」
...These were the only indications we coulddiscover of the existence of primordial man upon the scene...
Ernest Giles 「Australia Twice Traversed, The Romance of Exploration」
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